pbl_ds_2021 Link đăng kí team https://docs.google.com/spreadsheets/d/1_kABEqOUT1ooVFLj5_gPihxgmIWEp8dnQJw-bCtMxqA/edit?usp=sharing Link video record: https://youtube.com/playlist?list=PLdFP3qF24K36LxCpvxBpBIy2-lgFv7WAy